... caused stable working > Connect with a mini siren for alarm> AVI recording and JPG snap optional > Overwriting when memory ... clearly > Internal lithium battery for emergency use> Real time clock record the time for every video/picture > Mode Exchange for ... -60HZ, DC5V, 1.5ARC distance≤8MIR distance5M-8MIR wavelength850NM Alarm output, Video output, and switcherControl keypad on the backsideSD groove ...